Tachometer Compatible with Oliver Tractor 1550 1555 1650 1655 1650 158389A-R other manufactures have different ohms

other manufactures have different ohms

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if used outdoors

Fits dash opening of 2" 52mm

Positive Ground

Tachometer Compatible with Oliver Tractor 1550 1555 1650 1655 1650 158389A-R other manufactures have different ohmsThis clockwise tachometer fits: 1550 1555 1650 1655 tractors Tachometer has a 5 8" UNF cable end and has a nice 12 volt light option feature. The light option feature you can choose to use or not to use it. The Oliver part numbers it replaces: 158389A R The diameter is of this tachometer is 3 3 8" (85mm) Check your dash diameter first. Tachometer cases are "Yellow Zinc Plated" for greatly improving corrosion resistance. Let me know if you need a 6